package com.lzq.zuul.filter;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;

//@Component
public class DynamicRoutingFilter extends ZuulFilter {
    @Override
    public String filterType() {
        return FilterConstants.PRE_TYPE;
    }

    @Override
    public int filterOrder() {
        return FilterConstants.PRE_DECORATION_FILTER_ORDER + 2;
    }

    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() throws ZuulException {
        //获取request对象
        RequestContext currentContext = RequestContext.getCurrentContext();
        HttpServletRequest request = currentContext.getRequest();
        //获得redis参数
        String redisKey = request.getParameter("redisKey");
        if(redisKey != null && redisKey.equalsIgnoreCase("customer")){
            currentContext.put(FilterConstants.SERVICE_ID_KEY,"consumer");
            currentContext.put(FilterConstants.REQUEST_URI_KEY,"customer");
        }else if(redisKey != null && redisKey.equalsIgnoreCase("search")){
            currentContext.put(FilterConstants.SERVICE_ID_KEY,"PRODUCER-SERVICE");
            currentContext.put(FilterConstants.REQUEST_URI_KEY,"search");
        }
        return null;
    }
}
